ISO7420FE Low-Power Dual Channel Digital Isolators | TI.com

ISO7420FE (ACTIVE)

Low-Power Dual Channel Digital Isolators

 

Recommended alternative parts

  • ISO7720  - The device has the SAME FUNCTIONALITY and PINOUT as the compared device but is NOT an exact equivalent.   Pin-to-pin upgrade with higher isolation, stronger CMTI, wider supply range, and better immunity and robustness

Description

ISO742x provide galvanic isolation up to 2500 VRMS for 1 minute per UL and 4242 VPK per VDE. These devices have two isolated channels. Each channel has a logic input and output buffer separated by a silicon dioxide (SiO2) insulation barrier. Used in conjunction with isolated power supplies, these devices prevent noise currents on a data bus or other circuit from entering the local ground and interfering with or damaging sensitive circuitry. ISO7420 has both channels in the same direction while ISO7421 has the two channels in opposite direction. In case of input power or signal loss, default output is 'low' for devices with suffix 'F' and 'high' for devices without suffix 'F'. ISO742x have no integrated noise filter and thus have fast propagation delays.

These devices have TTL input thresholds and operate from 3-V to 5.5-V supplies. All inputs are 5-V tolerant when supplied from a 3.3-V supply.

Features

  • Signaling Rate > 50 Mbps
  • Default Output 'High' and 'Low' Options
  • Low Power Consumption: Typical ICC per Channel (3.3-V Supplies):
    • ISO7420: 1.4 mA at 1 Mbps, 2.5 mA at 25 Mbps
    • ISO7421: 1.8 mA at 1 Mbps, 2.8 mA at 25 Mbps
  • Low Propagation Delay: 7 ns Typical
  • Low Pulse Skew: 200 ps Typical
  • Wide TA Range Specified: –40°C to 125°C
  • 50-KV/μs Transient Immunity, Typical
  • Isolation Barrier Life: > 25 Years
  • Operates from 3-V to 5.5-V Supply Levels
  • 3.3-V and 5-V Level Translation
  • Narrow Body SOIC-8 Package
  • Safety and Regulatory Approvals:
    • 4242 VPK Isolation per DIN V VDE V 0884-10 and DIN EN 61010-1
    • 2500 VRMS Isolation for 1 minute per UL 1577
    • CSA Component Acceptance Notice 5A, IEC 60950-1 and IEC 61010-1 Standards
    • CQC Certification per GB4943.1-2011

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Parametrics Compare all products in Digital isolators

 
Integrated isolated power
Number of channels (#)
Forward/reverse channels
Isolation rating (Vrms)
Surge Voltage Capability (Vpk)
Data rate (Max) (Mbps)
Propagation delay (Typ) (ns)
Default output
VCC (Min) (V)
VCC (Max) (V)
Rating
Operating temperature range (C)
Pin/package
ISO7420FE ISO7420 ISO7420E ISO7420FCC ISO7420M
No     No     No     No     No    
2     2     2     2     2    
2/0     2/0     2/0     2/0     2/0    
2500     2500     2500     2500     2500    
4000     4000     4000     4000     4000    
50     1     50     50     1    
7     9     7     20     9    
Low     High     High     Low     High    
3.3     3.3     3.3     3.3     3.3    
5     5     5     5     5    
Catalog     Catalog     Catalog     Catalog     Catalog    
-40 to 125     -40 to 125     -40 to 125     -40 to 125     -40 to 125    
8SOIC     8SOIC     8SOIC     8SOIC     8SOIC